MaxxMMA Training & Fitness Heavy Bag Neon Yellow Ideal for 4 different workouts mode: Heavy bag mode, Fitness mode, Uppercut bag mode, MMA dummy ground training mode This bag is perfect for grappling, throwing, training, fitness and MMA ground and pound Water/Air combined Bladder allows the user to experience the simulated feeling of punching a real human being and not just a bag of sand! The bag also forces you to retain your balance while doing exercises which work your core, abdominal and overall balance. Weight adjustable weight from 20 to 120 lbs